Head down into the yard and take cover behind something. You will have to work your way slowly through the docks to the truck you need to inspect, so take your time. You may want to use the P90 you picked up (you can save up your MP5 ammo for later - or vice versa).

Apart from the enemies coming from the "right" side of the map (where the stairs to the upper level of the dockhouses are), there are enemies hiding in the loading bay to the "left" as you enter this zone.

When the coast is clear, open the van's doors and get ready for Round 2.

When the ambush occurs, hang back and let your air support and allies take on the brunt of the enemy counter-assault. Choose to hide around the corner and take down the enemy reinforcements to reduce their spawn count.

Work your way towards the warehouses to the construction yard, but be aware that enemies can appear around corners if they are not cleared. It's best to move forward into a confined spot with cover, and pull the invisible "tether" which ties you to the bots following you. Once they come up, they will react to hostile bots, both covering you and forewarning you of enemy positions.

Head through the construction area and feel free to use the debris mound over which you can fire at enemies on the other side. Frag grenades won't be of great help on the train ride (unlike flashbangs) so feel free to use them to flush out enemies from cover.

Get aboard the pick-up truck and crouch to get some cover from the protrusions on the side. Be ready to snap-aim a bunch to nick and kill the gunmen firing from the train cars.

There is a checkpoint in the tunnel, and from there, you can try your luck (and snap-aim) at the enemies on the train to your sides, front and back as you try to take out their henchmen before they kill you. Ultimately, the ride ends at the metro station ... without any input from you.

Let your ally take out the three enemies at the entrance to the metro. Use the bulk of the corner to provide defence against incoming enemy fire.

Since the enemies spawn in two waves, head to the stairs midway through the hall, then conduct a retreat to the corner by the tracks again. Wean the incoming enemies, and when all is quiet, head out.

There is a sticking point at the bottom of the first set of escalators. Enemies will fire from the top of the moving stairs while grenades are thrown down. This effectively traps you unless you can snap-aim, down all enemies, and escape the resulting explosion from the grenades.

If you need to take cover, use the piece of particle board on the right escalator to defend yourself (you may get killed by the frag grenades on occasion). Flashbang the enemies at the stairs and quickly disable them whilst they are stunned.